Research on the Key Influencing Factors of the Backflow Phenomenon on the Primary Side of the Inverted U-tube Steam Generator under Natural Circulation

Wang Tianshi; Wang Yuxuan; Zhao Pengcheng; Wang Xijie; Ling Yufan; Wang Yuqing; Zhu Enping

doi:10.13832/j.jnpe.2022.02.0040

Volume 43 Issue 2

Apr. 2022

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Wang Tianshi, Wang Yuxuan, Zhao Pengcheng, Wang Xijie, Ling Yufan, Wang Yuqing, Zhu Enping. Research on the Key Influencing Factors of the Backflow Phenomenon on the Primary Side of the Inverted U-tube Steam Generator under Natural Circulation[J]. Nuclear Power Engineering, 2022, 43(2): 40-46. doi: 10.13832/j.jnpe.2022.02.0040

Citation:

Wang Tianshi, Wang Yuxuan, Zhao Pengcheng, Wang Xijie, Ling Yufan, Wang Yuqing, Zhu Enping. Research on the Key Influencing Factors of the Backflow Phenomenon on the Primary Side of the Inverted U-tube Steam Generator under Natural Circulation[J]. Nuclear Power Engineering, 2022, 43(2): 40-46. doi: 10.13832/j.jnpe.2022.02.0040

Citation:

Wang Tianshi, Wang Yuxuan, Zhao Pengcheng, Wang Xijie, Ling Yufan, Wang Yuqing, Zhu Enping. Research on the Key Influencing Factors of the Backflow Phenomenon on the Primary Side of the Inverted U-tube Steam Generator under Natural Circulation[J]. Nuclear Power Engineering, 2022, 43(2): 40-46. doi: 10.13832/j.jnpe.2022.02.0040

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Research on the Key Influencing Factors of the Backflow Phenomenon on the Primary Side of the Inverted U-tube Steam Generator under Natural Circulation

doi: 10.13832/j.jnpe.2022.02.0040

1.
School of Nuclear Science and Technology, University of South China, Hengyang, Hunan, 421001, China
2.
Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2021-02-25
Rev Recd Date: 2021-03-23
Publish Date: 2022-04-02

Abstract

Abstract

Backflow exists in the inverted U-tube steam generator (UTSG) under the condition of natural circulation, which affects the heat carrying capacity and natural circulation capacity of the primary circuit coolant system. Referring to the design parameters of UTSG in PWR thermal experimental device (PWR PACTEL) in Finland, this paper uses computational fluid dynamics (CFD) software Fluent to simulate the backflow in UTSG under the condition of uniform flow decline, and studies the influence of primary side operation parameters, UTSG design parameters and secondary side operation parameters on the backflow. The results show that increasing the primary side temperature, primary side operating pressure and thermal conductivity of the inverted U-tube will increase the critical mass flow rate of the UTSG, making the UTSG more prone to backflow; Increasing the water supply and temperature on the secondary side of UTSG and the roughness of the inner wall of inverted U-tube will decrease the critical mass flow rate of UTSG and restrain the occurrence of backflow. Changing the wall thickness of inverted U-tube has little effect on the backflow; Compared with changing the temperature of the secondary circuit, changing the temperature of the primary circuit has a more significant impact on the backflow. The results of this study can provide some reference for the parameter optimization of UTSG.
- Natural circulation,
- UTSG,
- Backflow,
- Computational fluid dynamics,
- Key influencing factors

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References(13)

References

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